Lond Name

Vue.js

HTML

<div id="app">
  <div v-if="username.length<8">Welcome, {{ username }}</div>
  <div v-if="username.length>=8">Welcome, {{ username.substring(0,8)+".." }}</div>
</div>

JavaScript

new Vue({
  el: '#app',
  data: {
    username: 'AVERYLONGGGNAMMEEE'
  }
});